Shoe-sewing machine.



A. LATHAM.

SHOE SEWING MACHINE.

APPLICATION FILED JAH. 26,1911.

1,092,580. A Patented Apr.7,1914

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DA. yATHAM; SHOE' SEWING MACHINE. y A ,1 g 'APPLIOAIIONTILBDJAI".ze.1911.. 109258@ f Patented Apr. 7,1914.

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sonvswma MACHINE. APPLICATION FILED JAN.26, 1911. K

Patented Apr. 7, 1914.

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. A.. LATHAM. .l sHoB'sEWING MAGHINB. Y APPLIoATIoN FILED JAN.Y'26,1911. A Y

' Patented Apr. 7, 1914 v 7 SHEETS-SHEET 6.

l A. LATHAM. v SHOE SEWING MACHINE. APPLIGATION FILED JAN..26,1911-.

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Patented Apr'. 7, 1914.-

UNITED STATES PATENT oEEIoE.

ALBERT LATHAM, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNlTED SHOE MACHINERY COMPANY, F IPATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SHOE-SEWING MACHINE.

Specication of Letters Patent.

Patented Apr. 7, 1914.

Application led January 26, 1911. Serial No. 604,844.

'tains to make and use the same.

The invention relates to inseam sewing .machines such .as `are used in the manufac- Iture of boots and shoes in uniting the .ulp-

-.pers,1insoles, and welts of vwelt shoes.

'Illhe primary object of :the invention is to provide novel and improvedmeans for severingthe welt at the completion of the shoe, .and for presenting the end of the welt 1n proper relation to the shoe `at the beginning of the sewing of the seam .wherebv the welt maybe severed close .to the end of the inseamand the seam may be' started close to the end of the welt, with "a resultinfeconom in the welting used. To these ends the we t severing devices are arranged to sever the welt back of the sewing point, and means is provided for feeding the welting to project its end the proper distance beyond the sewing point preparatory to operating upon anot 1er shoe. By arranging the severing devices the proper distance back of the sewing point, any desiredlength of unattached welt may be providedfor at one end of the inseam, and by proper adjustment lof the welt feeding devices the same or any desired length of unattached Awelt may be provided for at the other end of the inseam. Thus th: welt may be severed at auniform distance from the end of the inseam, and the inseam be started at a uni-` form distance from the'end of the welting without any care or skill on the part'of the operator, and the welt may be so severed and the welting so fed as to avoid all waste of welting.

Further objects of the invention are Vto provide improved means for severing and holding lthe thread whereby the end of the thread is held under tension during the first part of the loon drawing stroke of the needle Iin forming the first stitch and the proper drawing of the loop through the worlr is insured, a novel and improved construction of welt guide whereby the welt is vfirmly held cluri'ng the operation of the stitch forming devices and is released so that itv may move freely through the guide during the feed of the .shoe or during .the feed of the welt, and a novel and improved means for holding the welt guide up -to the shoe during at least one cycle of operations of the sewing mechanism at the beginning of the sewing operation.

To ese ends the invention consists in Lthe features of construction and combina- :ton of parts hereinafter described and re- :terred to in t-he claims.

The :features of the invention will be Aread-ily understood 'from an inspection ofI the accompanying drawings and the following detailed description of the mechanism Iillustrated therein.

In the drawings Figure 1 is a right-hand .side .elevation of a' sewing machine embodying the features of the invention in their preferred forms; Fig. 2 is a left-hand 'side .elevation of the machine; Fig. 3 is a sectional plan view showing the mechanism for guiding and manipulating the welt;` Fig. 4 .is a front elevation of the mechanism shown in Fig. 3; Fig. 5 is a sid-e elevation partly in section showing the devices for retaining the welt guide in advanced position at the beginning of the sewing operation; Figs. 6, 7 and 8 are details illustrating the mode of operation of this mechanism; Fig. 8ft is a detailed perspective view of part of this mechanism; Fig. 9 is a sectional view Yon line 9-9, Fig'. 3; Fig. 10 is a "sectional view on line 10-10, Fig. 3; Fig. 11 is a 'detail sectional view on line 11--11 Fig. 10; Fig. 12 is a horizontal sectional view through the welt guide; Figs. 13, 14 and 15 are sectional views on lines 13-13, 11k-14, and 15-15 respectively of Fig. 12; Fig. 16 is a detaill front elevation showing the devices for severing and holding the end of the thread; Figs. 17 and 18 are sectional views on lines 17-17 and 18-1S respectively of Fig. 16; Fig. 19 is a side elevation -looking'toward the left in Fig. 1G,`

showing the thread holding clamp in position for releasing the end of the thread; and Fig. 20 is a sectional view on line 20-20, Fig. 17.

In the drawings the. invention is shown embodied in the vinseam sewing machine shown 'and described in .the application of Villiam C. Meyer, Serial No. 568,248, filed June 22, 1910, and except so far as modified and changedby the embodiment of the 1nvention therein, the construction and mode of operation of the machine illustrated is 5 the same as that of said application.

The machine illustrated is provided with a curved hook needle l, a needle guide 2, a looper 3, a thread arm 4, a channel guide 5, an awl 6, a take-up 7, an auxiliary take-up 8, and tension devices 9, which are constructed and arranged as in the application above referred to, and are operated from the cam shaft 10 of the machine through mechanisms which are fully described in the above application, and which will be readily understood by anyone skilled in the art from an inspection of the drawings in the present application. The machine is also provided with a'welt guide 1l formed on or secured 20. to the forward end of an arm 12 which is pivotally connected to the forward end of the Welt guide slide and to the pivoted arm 13 which supports the forward end of the welt guide slide. As shown, the arm 13 is bifurcated to embrace the welt guide arm 12 and the arms 12 and 13 are connected by pivot pins 14 and 15. The pivot pin 14 also forms the pivotal 'connection between the forward end of the welt guide slide and the arms 12 and 13 (Fig. 12). The rear end of the arm 12 is provided with a roll engaging a fixed cam 1.6 which imparts an oscillating movement to the welt guide as it is ad- Vanced and retracted. The welt guide slide 85 is formed in two sections 17 and 18 which are connected together by a yielding connection 19 .so that the rear section 18 may be retracted independently of the frontsection when the Welt guide is held in advanced po- 40 sition at the beginning of the sewing opera tion by the mechanism hereinafter described..

During the normal' running of the machine the welt guide slide is advanced and retracted to move the welt guide toward and from the s hoe by the spring 2O and the oscillating lever 21 which is connected with the rear section 18 of the slide through the clutches 22 and/a clutch actuating block 23 such as fully described in the Iabove application.

'350 In the construction shown, the means for s vering the welt at the completion of the y sewing operation consists of a knife blade 24 arranged -to reciprocate transversely- 6,0 knife block through an arm 27, and also provided with an arm 28 through which it is rocked to advance and retract the knife block (Figs. 1, 3, 4, and 9 to 13). The arm .2 8 carries roll 29 arranged to be engaged sfwbyjythefront end of a slide 30 and to enter ,adapted to engage similar teeth formed on a vertical slot 31 formed at the front end of Vthe slide. The slide is connected to one arm 32 of a bell crank lever, the other arm 33 of which is connected with a spring 34 which normally holds the slide 30 in retracted po 70 sition. The arm 33 of the bell crank lever is connected through a rod 35 with a treadle (not shown) through which the operator may actuate the bell crank lever to advance the welt cutting knife. As soon as the treadle isreleased the spring 34 acts to retract the slide 30 andthus return' the knife to its normal retracted position.

, The welt severing knife is arranged to sever the welt in advance of the sewing point, and after the welt is severed it is necessary to feed forward the welting so that its end will project the proper distance beyond the sewing point at the beginning of the next sewing operation. The machine is 35 accordingly provided with means for advancing the welt through the welt guide, and this means is preferably connected with the knife actuating mechanism in such manner that it will be operated by the return of the knife actuating mechanism to normal position. 'In the construction shown the Welt feeding means comprises a feed roll 36 against the periphery of which the welting is held by a pressure roll 37 (Figs. 1, 3, 4, 10 and 11). The periphery of the feed roll 36 is preferably knurled or roughened to Secure a firm grip upon the welting, and the pressure roll 37 is mounted in a lever 38 and is held yieldingly against the weltin by a spring 39. The feed roll 36 is oosely mounted on the shaft 40 so that it may turn freely and not interfere with the forward movement of the welt during the sewing operation. The roll is operated to feed forward the we lt after the welt has been severed at the completion of the sewin operation by a clutch sleeve 41 keyed on the shaft 40`and provided with fine ratchet teeth the end of the roll 36.y The clutch sleeve is l held in engagement with the end'of thc feed roll by a light spring 42, and the teeth are. so shaped that they offer no substantial resistance to the forward movement of the roll as the welt is drawn forward. The inner end of the shaft 40 is connected through beveled gea-rs 43 with a shaft 44, to the lower end of which a spiral gear 45 is secured. The gear 45 is engaged by a gear segment 4G formed on one arm of a lever 47, the other arm of whichis pivotally connected to the front end of an' actuating rod 48. The rear end of the rod 48 is supported in an arm 49 secured to the rear en'djof the 125 knife actuating slide 30, `and adjustablenuts- 50 are arranged on the rod on opposite sides,` of the arm.l The forward and returnjimpvements of the rod 48 are determined by lstop collars 51 and 52 adiustablv secured on the 130 rod and arranged to engage opposite sides of a fixed stop lug 53. The nuts 50 are so welt guide before the welting is fed forward.

The forward movement imparted to the Vslide and rod 48 isl determined by the stop 52, or by a sto screw 54 on the slide 30.

The extent to w ich the welt is fed forward by the welt feeding roll may be varied by adjusting the stop collar 51, since the position of this collar determines the retracting movement imparted to the feed actuating rod 4,8.

Then the treadle is depressed to actuate the welt severing knife the rod 48 is advanced and rocks the shaft 40. The connections are Asuch that at this time the clutch I42 is moved in a direction to ride idly over the teeth in the end of the feed roll 36. When the treadle is released andthe slide 30 retracted the, knife is drawn back out of the welt guide so that it will not interfere with the forward feed of the welt.- During this movement of the knife the arm 49 moves idly along the rod 48, and after the knife has been withdrawn out of the path of the wel-t the arm engages the rear nut 50 and retracts the rod 48. The rearward movement of the rod 48 rotates the shaft 40 and clutch 41 in a direction to turn the feed roll 36 forward and feed forward the welt. The stop collar 51 is so adjusted that it will engage the stop block 53 and arrest the rotation of the feed roll when the end of the welt has been projected beyond the sewing point to the desired extent.

The welt guide should act to hold the welt accurately in position during the operation of the stitch forming devices and at the same time should be so constructed as to offer the minimum resistance to the forward feed of the welt during the sewin operation and to the passage of the welt tirough the welt guide when the welt is advanced after it is severed from the completed shoe.' The welt guide of the present machine is accordingly so constructed that it may be contracted'to hold the welt and may be .expanded to release the welt and allow it to move freely through the guide. In the construction shown the welt uide is contracted and expanded by advanclng and retraeting that part of the guide which engages the outer edge of the welt and acts as a gage for guiding the edge of the welt. The preferred construction of gage is shown in Figs. l2, 14 and 15. As here shvown, the welt is guided as it enters the welt guide, by an anti-friction roll 55 carried by a block 56 whichfis adjustably secured to the welt guide armf412 by a screw 57 passing throngha Aslot 58 in a the arm.. ,This 'roll is soadjustedfu-that ,the

for acting on the outer edge of the welt, and

are carried in a slide60 which is mounted to reciprocate in a guldeway formed 1n the welt arm 12. The slide is advanced to con'' tract the welt guide and thus hold the welt during the operation of the stitch forming devices, and is retracted to expand the welt guide and thus release the welt during the feed of the shoe by means of a cam groove 61 formed in a. cam disk G2, -and arranged to engagea roll on the end of a lever 63 which is connected with the slide. The connections Ibetween the lever vand slide in the construction shown consist of a 'segment 64 formed on the lower end of the lever and arranged to engage a rack formed on a' sleeve 65 which surrounds a rod 66. The forward end of the rod 66 is screwed into the rear end of a slide 67 the front end of which carries an arm -68 connected with tne slide 60 by a pivot block 69. The block 69 is mounted in a vertical slot formed on the under side of the slide 60, and turns freely on a bearing 70 formed on the arm 68. The sleeve 65 is' mounted to slide in a bearing 71v and is held freni turning by a screw 72 en gaging a key-way formed in the sleeve. The sleeve is connected with the rod 68 through springs 73 and 74 arranged in recesses in the ends of the sleeve and interposed between the bottoms of the recesses and Collars 75 and 76 secured on the rod. The colv lar 76 is screw-threaded on the rod so that it may be adjusted to vary the tension of the springs. The rear end of the rod is provided with a knurled collar 77 thro/ugh which the rod may be turned to adjust the position of the gage rolls 59 in accordance with the width of welting being used. The

spring 73 forms yielding connection between the lever 63 and thel gage slide, so that the gage is forced yeldingly against the welt when the slide i's advanced, and the spring 74 forms a yielding connection between the lever and gage slide which may yield to allow the lever to move independently of the gage when the welt guide is retained in advanced position at the beginningof the sewing operation, as hereinafter described. When the machine is turned into position for the removal of the work at the :completion of a shoe, the cam 61 is brought into position to retract the gage slide so that the welt is released and is free to move through the welt guide when the welt cutting arid feeding devices are operated.

In order that the thread may be conveniently severed after a shoe has been sewed,

isov

chine is turned into position for the removal of a completed shoe, the upper endof the arm 80 is in its forward position, and

the thread severing knives are in proper position for severing the thread. In rernovino` the shoe after the welt has been severed the operatorraises it and then moves it downward. .The upward movement of the'shoe .carries the thread up along the inclined under edge of the blade 78, and as soon as the thread passes above the blade` it springs inward into the V between the blades 78 and 79, and is .severed when the shoe is moved downward. AThe upward movement of the shoe to bring thel thread'to the thread-severing devices carries that part of the threadwhich extends from the looper 3 to the seam up' between the jawsof `a` thread holding device which is arranged between the end of the looper vand the thread severing device. In the'construction shown,l the thread holding device consists .of-.two jaws 81 and 82. Thejaw 81l is formed on the outer end of a pivot 'stud 83' which is mounted in a bearing in the plate l84 which forms a part of the frame ofthe machine.V The jaw 82 is provided with a hollow stud 85 which engages a recess formed in the, outer endI ofthe studl83,;and the plate 82 is forced yieldingly toward the plate .81 by a spring 86 (Figs. 16 to 20).A The jaws. are held from relative swinging movement'by a pin 87 projecting from the jaw 8l through,

a hole in lthe jaw 82. The jaws are opened and closed by means ofa disk 88 surrounding the stud 85, and provided with cam lugs u, 89 cooperating withcanrrecesses 90 in the "jaw 82. The disk 88 is also providedvwith a lug 91 adapted to `play between two stops 92 formed on a stop late 93 which is4 se- 'cured to the frame p ate 84. The thread.

holder is held in normalposition by a rack pin 95 which engages teeth formed in the stud 83, and is operated .by a leaf spring 9(1,arranged to engage the-head of the pin. The spring operates to hold the thread' holder in the position indicated in Fig.- 16, at which time lthe lug 91. is in engagementl with the right-hand stop 92, and the cam lugs 89are in register with the recesses 90. so that the jaws of the'fholder are held closed.

' `When the shoe is liftedto sever the thread 'the thread passes up- E-be'tween the jaws 81 and .82 and :is rmly-gripped by the jaws. When the machine is rstarted at the beginning of the sewing operation upon the next I shoe, the looper lays the thread-in the eye of the needle, and then the needle is retracted to draw a loop of thread through the work. During this movement of the needle the thread holder continues to hold the end of the thread so ,that the thread leading from the eye of the needle is held under tension until the loop has been drawn into the work. Durn this movement of the needle the threa holder swings toward the right in,- Fig. 16 against the tension of the spring 96, and after the loop has been drawn into the work the lug 91 strikes the left stop 92, 'arresting the movement of the cam disk 88. During the continued forward movement of the thread holding jaws the cam lugs 89 ride out of the recesses 90, forcing the jaw 82 away from the jaw 81 and releasing the thread. i The thread holder immediately snaps back to normal position under the influence of the spring 96, .the lug 91 strikes against the right-hand stop 92, shifting thev disk 88 so that the thread holding jaws are closed, ready to again grip and hold the thread at the end of the sewing operation.

The tension. put upon the thread by the thread holding jaws may be regulated by an adjustin screw 97 which determines the tension of t e spring 96.

AAt'the beginning of the sewing operation the welt guide is held in advanced position. for atleast one cycle of operations performed by the machine, so that the end of the welt is held close to the shoe until it has been securely attached thereto by the stitch. forming devices. These devices are so constructed that they are moved into po* sition. to hold the welt guide when the rotation of the cam shaft of the machine is reversed to throw ofi' the tension and move theparts into position for removal of the shoe at the completion of the sewing operation. These devices are best shown in Figs. 2 to 8. As here shown, the lever 98 which is rocked to throw 0H the tension when the cam shaft of the machine is reversed at the completion of the sewing operation, is connected by a rod 99 with an arm 100 which is mounted on a stud '101. The arm 100 is provided with a hub, the end of which is connected by a coupling with the hub 102 of a second arm 103 which is also mounted on the stud 101. The outer end of the second arm is pivotally connected to a vertical rod -104, the lower end of which passes through an arm 105 secured to the rock shaft carrying the arm 13 which supports the welt guide slide. The rod is provided with a collar-106 which enga-ges the arm 105 when the lever 98 is rocked by the reversal of the cam shaft, and swings the arm 13 to retract the welt guide. lVhen the machine is again started, the welt guide moves forward and is" held in its advanced position Y 109 strikes the upper end of the pin 107 and depresses during the formation of the first stitch by devices rendered operative when the cam shaft was reversed. In the construction shown these devices comprise a latch pin 107 mounted in a recess formed in the end of the pivot stud 15 which is secured in the upper end of the arm 13. The head of the pin is normally held in position above the stud 15 by a spring 103.` The latch pin is arranged to coperate with the front end of an arm 109. which projects forward through a sleeve 110 mounted to turn freely' on the hubs of the arms 100 and 103. A second arm 111 projects from the sleeve 110 Vand carries a spring operated Aretaining pin 112, the outer end of which is V-sha ed and is arranged to engage one or the ot 1er of two notches 113 formed in a retaining plate 114. The sleeve 110 is also provided with a third arm 115 which carries devices through which the sleeve is rocked to disengage the arm 109 from the latch pin 107,

and to render the welt guide retaining desewing operation preparatory to AremovingV the shoe, the arm 103 is swung downward, and by its engagement with a lug 116 on the arm 109, moves the arm 109 down into active position. This movement of the arm 109 brlngs the retaining pin 112 into the upper notch 113, so that the arm 109 is retained in this position. When the arm 109 is thus moved downward the 'welt guide has been retracted through the downward movement of the rod 104 so that `the lever the pin into the position shown 1n F1g. 2. This movement of the arm 109 also swings the rear end of the arm 115 up toward the cam shaft of the machine, and brings the devices on the rear .end of the arm into position to bei acted upon by a lug 117 on the cam disk 62. The devices' on-the rear end of the arm 115 comprise a tripping lug 118 formed on a disk 119 which is secured to a pivot shaft 120 carried by the rear end of the arm. The lug 118 is broader than the body of the disk 119, and its base forms short segmental flanges rojecting from the opposite sides of.the disk. T hebody of the disk 'fits within the bifurcated end of the arm 115, and the in'ner surfaces of the base of the lug 118 project over the curved end of the arm, as indicated in Figs. 3, 5 and 8. The disk an arm 124 which is connected with the pawl 123 by a spring 125. The spring acts to hold the pawl yieldingly against the disk 119, and also tends to swing the disk in. a direction to hold the shoulder 122 against the end of the pawl. When the arm 115 is moved upward the pawl 123 is disengaged from the shoulder 122, lso that the shoulder is carried beyond the end of the pawl, as indicated in Fig. 5. The pawl 123 is thus disengaged from the shoulder 122 by a pawl 126 mountedon an arin 127 secured to the frame of the machine.

The pawl 126 is provided at its u per end with a hook adapted to engage a hook 128 on the pawl 123. When the arms 109 and 115 are in normal position the pawl 126 is engaged with the pawl 123, as indicated in Fig. 8.`\ When the arm 115 moves upward the pawl 123 is en a ed b the pawl 126 and 1s swung towar t e le in Fi 8, and toward the right in Figs. 2 and 5, hus disengaging the pawl 123 lfrom the shoulder on the disk 119z and allowin the disk to swing into the posltion indicate in Figs. 2 and 5. After the pawl 123 has been thus operated, the swinging of the pawl 123 during the continued upwardmovement of the arm 115 disengages the pawls 126 and 123. When the disk 119 is released by the pawl 123 it is swungby the spring 125 into position to bring the tooth 121 into the path of the lug 117. The disk, however, is free to swing in the end of the arm 115, so that the lug 117 may pass idly by the end of the lever as the cam shaft is reversed or turned backward. When the machine is started, and the cam shaft is turned'forward or in the direction of the arrow in Fig. 5, the lug 117l during the first revolution of the cam shaft acts upon the tooth 121 and turns the disk 119 into position to brin the lug 118 into the path of the lug 117. gIhis movement of the disk also brings the latching shoulder 122 into position to be engaged by the pawl' 123 so that the lug 1181s retained in the path of the lug 117 non the cam shaft. Now during the second revolution of the cam shaft the lug 117 acts against the lug 118,

as indicated in Fig. 7. This tends to turn the disk 119 toward the left in Fig. 7, and movement of the disk in this direction is prevented by engagement of the tooth121 with the upper end of the npawl123, so that the arm 115 is depressed lnto the position indicated in Fig.`8. This disengages the arm 109 from the pin 107, thus releasmg the welt guide and moving thearm 109 into inactive position so that the welt guide may be advanced and retracted in the usual manner during the continuance lof the sewing operation.- The downward movement of the arm 115 rengages the pawl 123 with the pawl 126, so that the pawl 126 may act'to re-set the tripping devices on the end of the 'arm 115 when the arm is again raised at the completion of the sewing operation.

While it is preferred to employ the specic construction and arrangement of parts shown and described in embodying the. invention in the machine of the application above referred to, it will be understood that this construction and arrangement is not essential, and may be varied and modified to best suit the conditions under which it is to be used, or the construction of the machine in which it is to be embodied.

Having explained the nature and object of the invention, and specifically described one form of machinev in which it may be embodied, what I claim is 1. A shoe sewing machine, having, in combination, stitch forming devices including a curved hook needle and looper, a welt guide, means'inactive during the sewing for severing the welt in advance of the sewing point, and means for actuating the welt severing means and for advancing the end of the welt beyond the sewing point after the completion of the sewing.

2. A .shoe sewing machine, having, in combination, stitch forming devices including a curved hook needleand looper, .a welt guide, a welt severing knife in advance of the sewing point, and mechanism under the control of the operator for actuating the knife and advancing the end of the welt beyond the sewing point after the completion of the sewing.

3. A shoe sewing f machine, having, in combination, stitch forming devices including a curved hook needle and looper, a welt guide, a welt severing knife arranged to reciprocate transversely through the welt guide, welt advancing means inactive during the sewing, and mechanism for advancing and retracting the knife and actuating the welt advancing means after the completion of the sewing.

4.-. A shoe sewing machine, having, in combinatiomstitch forming devices including a curved hook needle and looper, a welt guide, a weltsevering knife, welt feeding devices engaging the welt in advance of the knife, and mechanism for actuating the knife 4and welt feeding devices adjustable to vary the feed of the welt.

5.- A shoe sewing machine, having, in combination, stitch forming devices, a welt guide, welt severing devices, means inactive during the sewing for advancing the welt through the guide after it is severed, and means for expanding the guide during the advance of the welt, substantially as described.

6. A shoe sewing machine, having, in combination, stitch forming devices, welt severing devices, welt advancing means inactive duringefthe sewing, and means for holdin the welt during the operation of the stitc forming devices and for releasing the Welt during the operation of the welt advancing means, substantially as described.

7. A shoe sewing machine, having, in combination, stitch forming devices, a welt guide having a gage for the outer edge of the welt, and means for reciprocating the gage to hold-and release the welt, substantially as described.

8. A shoe sewing machine, having, in combination, stitch forming devices, a welt guide provided with a gage for the outer edge of the Welt, and means for advancing the age to hold the welt during the operation og the stitch forming devices and for retracting the gage during relative movement between the shoe and welt guide, substantially as described.y

9. A shoe sewing machine, having, in combination, stitch forming devices, a welt guide, mechanism acting normally .to retract the welt guide during each cycle of operations of the machine, a normall device for preventing the retractlon of the -welt guide, mechanism actuated by a4 reinactive versal of the cam shaft of the machine for moving the preventing device into position to engage and hold the Welt guide when it is advanced u on starting the machine, and

mechanism or rendering the preventin device inactive after the completion of at east one cycle of the operations of the machine,

substantially as described.

10. A shoe sewing machine, having, in combination, stitch forming devices, a welt guide, mechanism acting normally to retract the welt guide during each cycle of operations of the machine, a retaining arm 109 for preventing the retraction of the welt guide, means for moving said arm into active position upon a reversal of the cam shaft of the machine, an arm 115 connected with the arm 109, a lug 117 on the cam shaft, a tripping lug 118 ivotally mounted on the arm 115 and provided with a tooth 1'21 and latching shoulder 122, a latching pawl 123, 'and means for disengaging the pawl from the shoulder 122 when the arm 109 is moved into active position, substantially as described.

11. A shoe sewin machine, having, in combination, stitch orming devices, a welt guide, mechanism actu'ng normally to reprising a yielding latching pin connected with the Welt guide and a coperating lock-. ing arm, mechanism acting upon the reversal of the cam shaft to retract the Welt guide and to depress the locking arm against the end of the latch pin, and means operating when the machine is started to return the arm to inoperative position after at least one cycle of operations of the machine has been completed, substantially as described.

12'. A shoe sewing machine, having, in combination, stitch forming devices, a Welt guide, mechanism acting normally to retract the welt guide during each cycle of operations of the machine, a normally inactive retaining device for preventing the retraction of the Welt, and means acting upon the reversal of the machine for rendering said retaining device active, means for rendering said device again inactive comprising an arm connected with the retaining device, a lug on' the cam shaft, a disk 119 pivotally mounted onthe end of the arm and proi vided with a lug 118, a tooth 121 and a shoulder 122, a spring 125 tending to hold the disk with the tooth 121 in the path of the lug 117, a latching paWl 123 on the arm, and a re-setting pawl 126, substantially as described.

- ALBERT LATHAM. Witnesses:

CHESTER E. ROGERS, LAURA M. GooDBlDGE. 

